Iyo Evost Series Back Extension ine yekufamba-in dhizaini ine inogadziriswa kumashure rollers, ichibvumira mutsigiri kuti asarudze akasununguka huwandu hwekufamba. Iyo yakawedzera chiuno padhi inopa yakasununguka uye yakanakisa tsigiro mukati mese kwese kwekufamba. Iyo yese mudziyo zvakare inogara nhaka zvakanakira iyo Evost Series, yakapusa lever musimboti, yakanakisa mitambo ruzivo. Dual-position footrests inobvumira vashandisi kuti vasarudze iyo yakanyanya kugadzikana yekutsigira chinzvimbo zvichienderana nekufamba, nepo maviri-mativi ekubata achipa rumwe rutsigiro rwekuvandudza kudzidziswa kugadzikana.